For more than a century, in the center of Sofia, the capital of the Republic of Bulgaria, there is and functions the church of St. Nikolai Mirlikiyski the Wonderworker, known as the Russian church. The church was built at the beginning of the 20th century with the idea of being part of the complex of the Russian imperial diplomatic body in Sofia and to serve the Russian diplomats, their families and the Orthodox Russian citizens living permanently or temporarily in the Bulgarian capital. However, after its consecration in 1914, disputes began, both regarding the ownership of the church building and the canonical jurisdiction of the church—of the Metropolitan of Sofia or the Holy Synod of the Russian Orthodox Church in Moscow. This dispute culminated in September 2023, with the expulsion from Bulgaria of several Russian and Belarusian clergies serving in the Russian church on charges of espionage in favor of the Russian Federation. The subsequent closure of the church by the Russian ambassador Mitrofanova led to internal and external political tension and ecclesiological chaos in the country. The Russian side violated the Bulgarian Law on Religions, known as the Confessions Act 2002, and directly infringed the Statute of the Bulgarian Orthodox Church. This article provides expert answers to the public law, property rights and canonical issues concerning the case of the Russian church in Sofia, based on the relevant sources of law (ecclesiastical and civil).